If you were a Pokemon Gym leader...

Dark Type

just because

all you need to do is axe one without losing your pokemon and swap in 5 destiny bound wobbufets

I'd be the second leader

k then nevermind.

But what if the player cheated and traded with a friend who had a level 100?

The pokemon wouldn't obey him fast enough

They wouldn't even need to attack, if you're busy spamming Explosion, all the level 100 needs to do is withstand 2 Explosions, and it's in the bag if that's all you use.

Of course, it's another story if you use other attacks, but still, the level 100 makes the battle one-sided. Sooner or later, the level 100 would listen to the trainer, and take out one of the Lickylickys anyways. Maybe more if the player is lucky.

Six random. And changing every time you try again in case you lost last time. And with a lot of additional and changed rules for scoring. And also, you have to play mahjong first before you can enter the pokemon room. And after you win the first time, you have to have random pokemons both people and then try again, if you lose, then you have to try again from the start.